PDF malware analysis — malicious · 680a86bc4eeb1b58

MALICIOUS

PDF

58.8 KB Created: 2006-02-16 15:03:51 -08:00 Authoring application: lice (via ubst)

MD5: b756b20dce4e9d71f3d5479851793a71 SHA-1: 465ed56400aec00d40875d40ef542e3d8bacd71d SHA-256: 680a86bc4eeb1b58e566e392ce947d3f73739eac5f044466e1682d6f30882c38

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript that is heavily obfuscated. The ClamAV detection 'Pdf.Exploit.Dropped-94' and the ML classifier strongly indicate malicious intent. The JavaScript likely downloads and executes a second-stage payload, a common technique for initial compromise via spearphishing attachments.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

ClamAV: Pdf.Exploit.Dropped-94 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-94
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0076_000.js` `5e9bd793316bdf863692c56cadff23a421a480d37b0f3b080c9ba2dcfc1dda81`	pdf-javascript-stream	PDF /JS object 76 at offset 0x955	50351 bytes

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